ALEXANDRIA, Va., Oct. 21 -- United States Patent no. 12,442,625, issued on Oct. 14, was assigned to RUAG Ammotec AG (Thun, Switzerland).

"Cartridge case and tool for joining the base piece and case jacket of a multi-part cartridge case" was invented by Peter Biedermann (Lyss, Switzerland) and Peter Spatz (Bern, Switzerland).

According to the abstract* released by the U.S. Patent & Trademark Office: "A cartridge case for ammunition may include a rotationally shaped case jacket for receiving a projectile and an annular base piece for receiving a primer and the case jacket. An annular wall of the base piece on the side of the case jacket is conically shaped at least in sections with respect to its axis of rotation. A retaining section of the...